引信故障树的计算机辅助分析

故障树分析是对系统进行可靠性和安全性分析，预测和诊断故障常用的方法之一。文中主要介绍了适用于微机的故障树分析程序的功能和特点，并给出对电－２２引信发射周期前安全性故障树的计算实例。     

引信故障树的计算机辅助分析

故障树分析是对系统进行可靠性和安全性分析，预测和诊断故障常用的方法之一。文中主要介绍适用于微机的故障树分析程序的功能和特点，并给出对电─２２引信发射周期前安全性故障树的计算实例．     

引信安全系统及其功能范畴探讨

引信安全性设计是引信的核心技术之一，引信安全系统是引信安全性设计的主要体现形式。文中建立了引信安全系统的功能框架，结合引信安全系统与引信中其它子系统的关系，对引信安全系统在引信中的作用模式及其功能范畴进行了讨论。引信安全系统不是引信中一个独立的子系统，也不能简单地等同与引信中的保险与解除保险装置（机构）。     

引信故障树的计算机辅助分析程序设计

故障树分析是对系统进行可靠性和安全性分析、预测和诊断故障常用的方法之一。文中主要介绍了采用面向对象技术的引信故障树的计算机辅助分析程序设计方法及其实现的功能和特点．并给出了某引信发射周期内安全性故障树的计算实例。     

一种新型深水炸弹引信解除保险机构设计

为了适应深水炸弹引信在深水中能够安全可靠的接触保险,设计了一种新型的多重引信保险机构,该机构具有投弹保险、限位保险和辅助保险的多重功能,发射保险利用投弹重力环境剪断剪切销解除投弹保险;限位保险利用水压力来实现水压机构的错位移动解除保险;辅助保险确保了引信在未正常工作的情况下的安全处理.通过试验验证了多重保险的可靠性,结果表明:该机构对于深弹引信的安全性和可靠性是可行的.     

记忆合金在弹箭引信安全系统中的应用研究

研究利用Ti—Ni记忆合金的记忆效应，设计制作了引信安保机构原理样机，并对样机进行了解除保险可靠性试验、勤务处理安全性试验和气体炮试验。经一系列试验研究证明，记忆合金在弹箭引信安全系统中做保险件，具有保险、延期解除保险和驱动负载的综合能力。为引信多样化的安全设计提供了一种新的途径。     

某型炮兵子母弹子弹引信安全性分析

文章阐述了某型炮兵子母弹子弹引信作用原理及安全性设计准则。进而依据GJB 373A—1997《引信安全性设计准则》对该型炮兵子母弹子弹引信进行安全性分析,认为子弹引信的安全性设计满足《引信安全性设计准则》的相关要求,特别具有延期解除保险、非正常时序故障保险、子弹成串防错装和瞎火状态识别等安全特性。     

故障保险思想在引信安全性设计中的应用问题(续)

为了全面深入地理解与贯彻《引信安全性设计准则》，提高引信的安全性设计水平，在广泛招集关于故障保险论述和故障保险设计实例的基础上，详细分析和讨论了引信故障保险性能及其设计问题。随着引信技术的飞跃发展，引信故障保险设计内涵也发生了深废变化。改称引信故障保险为引信失效安全更能反映其内涵，现代引信失效安全应包含在下述三种情况下引信均不引起弹药的意外作用或爆炸；引信解除保险环境异常；引信所有保险装置失效、错     

迫击炮弹引信解除保险距离性能指标分析

为了准确确定迫击炮弹引信的解除保险距离性能指标，对迫击炮弹质心外弹道进行了大量计算，对比了迫击炮弹与加农炮、榴弹炮榴弹的威力特性，归纳了国外制式迫击炮弹引信的延期解除保险性能，分析了迫击炮弹的射击使用条件。国内已有制式引信的解除保险距离下限60m偏短，而对所有发射装药条件均要求200m的可靠解除保险距离也偏短，并且无必要。迫击炮弹引信解除保险距离下限一般应不低于100m，上限以0号发射装药平射考核时一般应不大于350m，而其它发射装药条件则不必再要求和考核。相应的解除保险时间一般可确定为2～5s。     

故障保险思想在引信安全性设计中的应用问题

为全面深入地理解与贯彻《引信安全性设计准则》，提高引信的安全性设计水平，在广泛搜集关于故障保险（ｆａｉｌ－ｓａｆｅ）论述和故障保险设计实例的基础上，详细分析和讨论了引信故障保险性能及其设计问题。随着引信技术的飞跃发展，引信故障保险设计的内涵也已发生了深刻变化。改称引信故障保险为引信失效安全更能反映其内涵。现代引信失效安全应包含在下述三种情况下引信均不应引起弹药的意外作用或爆炸：引信解除保险环境异常；引信所有保险装置（保险件）失效、错装、漏装或误装了不合格品；弹药配装引信、引信装定和手工解除保险等人工操作失误。引信失效安全性能是仅次于隔爆和冗余保险而比延期解除保险更为重要的安全性能。引信膛炸、早炸等恶性事故也与这些产品不具备失效安全性能有关。     

Nitrosation and Nitration of Tetraacetyldibenzylhexaazaisowurtzitane

Tetraacetyldibenzylhitane (TADBIW) was subjected to debenzylation by nitrosating with inorganic materials available commercially to synthesize tetraacetyldinitrosohexaazaisowurtzitane (TADNSIW). TADNSIW was purified, and its structure was determined by FTIR, 1H NMR, MS and element analysis. The debenzylation reaction of TADBIW gave quantitative benzaldehyde as a by-product. This indicates that the reaction produces an imine cation as an intermediate. Hexanitrohexaazaisowurtzitane (HNIW) was prepared from unpurified TADNSIW with the yield over 96.0 % and the purity more than 98.0 %. And the mechanism of the reaction from TADNSIW to HNIW is proposed to be oxidation of nitroso and nitration of acetyl on the molecule of TADNSIW, This reaction system involved is simple, and the reaction can complete within a short time and under mild conditions. The product can be easily to separate and the waste disposed readily.     

A Robust Algorithm for Watermarking 2D Vector Maps with Low Shape-Distortions

The technique of watermarking has been introduced into 2D vector maps for many potential applications such as protecting the copyright of important GIS （geographical information system） data and tracing the data source of military maps. In most previous works, although the validity of the map data could be preserved during the embedding procedure, the shape-distortions of the map elements are usually neglected which would tend to degrade the invisibility of the watermarking schemes. A shape-preserving algorithm for watermarking 2D vector maps is presented in this paper. A 1D distance sequence extracted from the original map is adopted as the cover data instead of 2D coordinates. A watermark bit is represented by changing the distributions of the cover data. The embedding procedure induces lower shape-distortions than in former works. Experimental results indicate better invisibility of the proposed scheme, as well as its robustness to certain attacks such as map simplification, interpolation, additive noise and most geometric transforms.     

Open Rule-setting System Applied to Conceptual Design of Engines

Open rule-setting method advanced in this paper concentrates on providing designers of engines with a convenient way to express their design innovations and develop the expected prototypes in the early CAD stage, and constitute effective models for the following analysis process of CAE and CAPP. The problems arisen in the process of conceptual design with the traditional experience-based development method are analyzed. Based on those analyses, open rule-setting method is presented and some associated technical problems are discussed. The functional framework of open rule-setting system was built as software engineering methods. The speciality of the engine product as a kind of complex product and the requirement of the engine product based on its structural particularity to rule-setting system are considered carefully. A demonstration is supplied to illustrate how the open rule-setting method enhances the efficiency and quality of the engine conceptual design.     

Research on Linux Network Device Driver

By analyzing the working principle of Linux network device driver, discussing the Linux network driver structure and its key technologies, the general network driver structure and its design methodologies in Linux system are summarized. Through modifying the network device driver of Linux device driver 3rd version snull, c and improving the COW technology, the Zero-Copy technology in Linux （kernel version 2.6.11 ） is implemented. In the end, the success test tells us that the thorough analysis of network device driver is the foundation of many applications, and it also provides a certain improvement to a lot of real applications, even to military application development.     

Improvement and Experiment of the Reamer in Vibra Cutter Against Wave Edge of Titanium Sheet Alloy Parts

By analyzing the influencing factors of part quality making of sheet alloy of titanium by vibra cutter, the shape of upper reamer is set as cylinder and wedge-shaped form, and the lower reamer as plain and hemicycle form, and its main structural parameters are defined as well. Then it is validated further that such improved vibra cutter reamer can be used to process curve-edged parts of titanium alloy sheet. The experimental result shows that the titanium alloy sheet parts processed by above equipment have no sharpen angles for convex parts and evident crevasse of concave-edged part. In summary, such improvement can eliminate the free-waved edge and improve the manufacture quality of titanium alloy sheet parts greatly.     

Experimental Study on the Small Flyer Initiating Behavior of Fine-grained Explosives

The initiating behavior of fine-grained explosives by small flyer is studied. The diameter of small flyer in this device is 1 ram. The test results indicate that the granularity of explosives has great effect on its flyer initiating sensitivity.The flyer initiating sensitivity of the fine-grained explosives is higher and the critical initiating energy is lower than that of common explosives. For common explosive, the flyer initiating sensitivity increases as the density is reduced. But for the fine-grained explosive, the test results are exactly opposite.     

Algorithm for Multi-laser-target Tracking Based on Clustering Fusion

Multi-laser-target tracking is an important subject in the field of signal processing of laser warners. A clustering method is applied to the measurement of laser warner, and the space-time fusion for measurements in the same cluster is accomplished. Real-time tracking of multi-laser-target and real-time picking of multi-laser-signal are introduced using data fusion of the measurements. A prototype device of the algorithm is built up. The results of experiments show that the algorithm is very effective.     

Influence of Installing Error on the Surface Shape Precision of the Axial Symmetry Aspheric Workpiece in Lapping

A method to calculate the surface shape error, which is caused by the installing error between the workpiece and the lapping tool in the process of form lapping, is proposed. The mathematical model which the installing translation error influences on the workpiece surface shape error is established. The changing rule of the error is simulated through the calculating example of the paraboloid workpiece. The results indicate that the surface shape error of the workpiece is increasing with the increase of the installing translation error, it is also increasing gradually along the center point of the curve surface to the edge, and the influence is severer to the curve surface with great curvature than that of the small curvature when the translation error is the same.     

Experimental Research on Output Performances of Giant Magnetostrictive Actuator

The paper introduces the performances of magnetostrictive actuators and its applications, discusses the design methods for the structure and internal magnetic circuit of a giant magnetostrictive actuator, and makes tests on the output displacement and force characteristics for an actuator using homemade magnetostrictive material. The experimental result shows that the actuator has satisfactory output precisions and ranges in transient and stable states, and can be used in lowfrequency vibration control system of precise equipment.     

Robust Graded Sliding Mode Tracking Control for Low Speed Spinning Ballistic Missiles

The nonlinear dynamic model of spinning ballistic missiles is established during the first boosting phase of the missile. Based on the conventional backstepping sliding mode control and the assumption of a two time-scale separation of missile dynamics, a graded sliding mode controller is designed with two sub-sliding surfaces which have invariability to external disturbances and parameter perturbations, and a matrix which comprises three first order low pass filters is introduced to prevent ＂explosion of terms＂. Owing to the upper bounds of the uncertainties are difficult to obtain in advance, adaptive laws are introduced to estimate the values of the uncertainties in real-time. Eventually, the numerical simulation results given to show the proposed controller can ensure the steady flight of missiles.